870 MHz Balanced Low Noise
Linear Amplifier
featuReS
•
•
ABA3115
data Sheet - Rev 2.0
15 dB Gain
High Linearity
•
+5 V Nominal Supply Voltage
•
Low Noise Figure: 2.7 dB (typ.)
•
Characterized at +25 dBmV output power
•
Wide Band operation to 870 MHz
•
Shutdown Mode
•
-40 to +85
o
C
•
RoHS-Compliant Package
APPLICAtIONS
•
Driver Amplifier
•
CATV - Distribution / Drop Amplifiers
•
Set Top Boxes
•
Home Gateway
The ABA3115 is a monolithic IC intended for use in
applications requiring high linearity, such as Cellular
Telephone Base Station Driver Amplifiers, CATV
Fiber Receiver and Distribution Amplifiers, CATV Drop
Amplifiers, CATV Set Top Boxes and Home Gateways.
Offered in a modified 16 lead surface mount SOIC
S3 Package
Modified 16 Pin SOIC
PRODUCt DESCRIPtION
package that is RoHS-Compliant, it is well suited for
use in amplifiers where small size, reduced component
count, and high reliability are important. The ABA3115
incorporates a shutdown feature under logic control
whereby power consumption is reduced to 15 mW
with a +5 V supply.
RF
IN
15 dB
RF
OUT
RF
IN
15 dB
RF
OUT
Figure 1: Block Diagram
04/2008
ABA3115
1
2
3
4
5
6
7
8
FB1
RF
IN1
RF
IN1
GND
GND
RF
IN2
RF
IN2
FB2
Figure 2: Pin Out
V
LC
GND
RF
OUT1
/V
DD1
GND
GND
RF
OUT2
/V
DD2
GND
I
ADJ
16
15
14
13
12
11
10
9
table 1: Pin Description
PIN
1
2
3
4
5
6
7
8
NAME
FB1
RF
IN1
RF
IN1
GND
GND
RF
IN2
RF
IN2
FB2
DESCRIPtION
Feedback for Amplifier A1
RF Input of Amplifier A1
RFInput of Amplifier A1
Ground
Ground
RF Input of Amplifier A2
RF Input of Amplifier A2
Feedback for Amplifier A2
PIN
9
10
11
12
13
14
15
16
NAME
I
ADJ
GND
RF
OUT2
/V
DD2
GND
GND
RF
OUT1
/V
DD1
GND
V
LC
DESCRIPtION
Current Adjust
Ground
RF output and VDD of Amplifier A2
Ground
Ground
RF output and VDD of Amplifier A1
Ground
Shutdown Logic Control
2
data sheet - Rev 2.0
04/2008
ABA3115
ELECtRICAL CHARACtERIStICS
table 2: Absolute Minimum and Maximum Ratings
PaRaMeteR
Analog Supply (pins 11, 14)
Shutdown Logic Control (pin 16)
RF Power at Inputs (pins 2, 3, 6, 7)
Storage Temperature
Soldering Temperature
Soldering Time
MIN
0
0
-
-65
-
-
MaX
+12
+6
+10
+150
260
5
UNIt
V
DC
V
DC
dBm
o
o
C
C
sec
Stresses in excess of the absolute ratings may cause permanent damage.
Functional operation is not implied under these conditions. Exposure
to absolute ratings for extended periods of time may adversely affect
reliability.
Notes:
1. Pins 1, 2, 3, 6, 7 and 8 should be AC-coupled. No external DC bias should be
applied.
2. Pin 9 should be AC-grounded. No external DC bias should be applied.
table 3: Operating Ranges
PaRaMeteR
RF Input / Output Frequency
Analog Supply: V
DD
(pins 11, 14)
Shutdown Logic Control: V
LC
(pin 16)
Case Temperature: T
A
MIN
50
+4.5
0
-40
tYP
-
+5
-
-
MaX
870
+9
+6
+85
UNIt
MHz
V
DC
V
o
C
the device may be operated safely over these conditions; however, parametric
performance is guaranteed only over the conditions defined in the electrical
specifications.
data sheet - Rev 2.0
04/2008
3
ABA3115
table 4: Electrical Specifications
(t
a
= +25 °C, V
dd
= + 5 VDC, V
lc
= +5 V, test System = 75Ω)
PaRaMeteR
Gain
Noise Figure
Input / Output Return Loss
CSO
(1)
CTB
(1)
MIN
14
-
-
-
10
-
-
-
-
-
120
-
tYP
15
2.5
2.7
3.2
18
-72
-75
+60
+35
-
150
3
MaX
17
3.0
3.5
4.0
-
-70
-73
-
-
33
170
-
UNIt
dB
dB
dB
dBc
dBc
dBm
dBm
o
COMMENtS
50 - 350 MHz
350 - 550 MHz
550 - 860 MHz
2nd Order Output Intercept Point
(OIP2)
(2)
3rd Order Output Intercept Point
(OIP3)
(2)
Thermal Resistance
Current Consumption
(3)(4)
C/W
mA
V
LC
= +5 V
V
LC
= 0 V
Notes:
(1) 132 channels, +25 dBmV per channel (measured at the output), 6 MHz channel spacing
(2) Two tones: 397 MHz and 403 MHz, +4 dBm per tone
(3) Characterized with I
ADJ
pin floating.
(4) Adding a shunt resistor from the I
ADJ
pin to ground will lower current but with some decrease in performance.
table 5: Shutdown Logic Control State table
StatuS
Power up
Shutdown
VLC
+5 V
0V
AMPLIFIER
ON
OFF
AMPLIFIER BIAS CURRENt
150 mA
3 mA
4
data sheet - Rev 2.0
04/2008
ABA3115
PERFORMANCE DAtA
Figure 3: typical Gain (S21) vs. Frequency
17
16.5
16
15.5
Gain (dB)
15
14.5
14
13.5
13
12.5
12
0
100
200
300
400
500
600
700
800
900
1000
Frequency
(Mhz)
Figure 4: typical Input and Output Return Loss (S11 and S22) vs. Frequency
5
0
-5
Return Loss (dB)
-10
-15
-20
-25
-30
-35
-40
0
100
200
300
400
500
600
700
800
900
1000
S11
S22
Frequency
(Mhz)
data sheet - Rev 2.0
04/2008
5
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